Lighting system



FIG. 1 is a perspective view of the lighting system showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image;

FIG. 4 is a right side elevational view thereof, the left side being a mirror image; and,

FIG. 5 is a bottom plan view thereof.

The broken lines in the drawings are included for the purpose of illustrating portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a lighting system, as shown and described. 